1100% is the change from 1 to 12
Calculation steps:
[( 12 - 1 ) ÷ 1] x 100 = 1100%
Formula
Percentage change = [(12 - 1) / 1] x 100
Subtract the new number by the original number
12 - 1 = 11
11 ÷ 1 = 11
11 x 100 = 1100%
Example